Similar to TR's 590. The 662-1 with added lift should work well with good flowing heads. The 662-2 is similar to the 650 and may be a new design to help with noise reduction, though with much less overlap. The choice will depend on the flow numbers, compression ratio and desired hp/tq peaks.
The 662-1 can stand up to 10.5 compression/pump gas.
Throttle body size will also depend on above but good news is you can be slightly large with no ill affect (low end tq loss) on an EFI bike. Our t-body can support 150hp with a 48 venturi but most end up with a 52. 58 and 60's are all the rage these days but most heads/exhaust/cams can not flow enough to support bodies that size. It is also all about the manifolds ability to flow. The SE 58 does not flow anywhere near our 44 because the restriction is in the manifold. I.E., a larger throttle plate will not add air after the point you've maxed out the manifold flow. Our new production version manifold is scheduled for flow test verification today and we should have numbers by tuesday. The Zippers 54 flows very well and should support your proposed motor combo.